<head>
<script>
function pop1()
{
window.open( "https://yimago.net/classical/", "mypopup", "popup=1, status=0, height=600, width=600, left=500, top=200" )
}
</script>
</head>
<body>
<div>Main window here...</div>
<div><input type="button" onclick="pop1();" value="Activate Popup Window"></div>
</body>
